Measurement-computing PCI-DAS6071 Bedienungsanleitung PDF herunterladen (Seite 38)

PCI-DAS6071 User's Guide Specifications

Parametrics

Table 7. Parametric specifications

Parameter

Specification

Max working voltage

(signal + common-mode)

Input must remain within ±11 V of ground

CMRR @ 60 Hz

±10 V: 95 dB

±5 V, 0 to 10 V: 100 dB

All other ranges: 106 dB

Small signal bandwidth, all ranges

1.6 MHz

Large signal bandwidth, all ranges

1.0 MHz

Input coupling

Input impedance

100 GΩ in parallel with 100pF in normal operation.

Input bias current

±200 pA

Input offset current

±100 pA

Absolute maximum input voltage

Power ON: ±25 V, Power OFF: ±15 V (±20 mA Note 3)

Protected inputs:

 CH<63:0> IN

 AISENSE

Power on and reset state

CH0 IN, single-ended mode, 0 V to 0.1 V input range (Note 4)

Crosstalk, DC to 100 kHz

Adjacent channels: –75 dB

All other channels: –90 dB

Note 3: The analog input sink/source current must be limited to an maximum of ±20 mA in the power OFF

state to prevent damage to the board. A 1000 Ω (¼ W) current limiting resistor should be placed in

series with each analog input channel being used in applications where the power OFF state

sink/source current into the board can exceed ±20 mA. Resistance values >1000 Ω may adversely

affect the noise and settling time performance of the board.

Note 4: Care should be taken to avoid the application of an input voltage to CH0 IN that could overdrive the

analog input circuit. Any unused analog input channel should be connected to LLGND.

Noise Performance

Table 8 summarizes the noise performance for the PCI-DAS6071. Noise distribution is determined by gathering

50K samples with inputs tied to ground at the user connector. Samples are gathered at the maximum specified

single-channel sampling rate. Specification applies to both single-ended and differential modes of operation.

Table 8. Analog input noise performance specifications (not including quantization)

Range

Counts

Dithered

LSBrms

Dithered

Counts

Undithered

LSBrms

Undithered

±10 V

0.5

0.25

±5 V

0.5

0.25

±2.5 V

0.5

0.25

±1 V

0.5

0.25

±500 mV

0.5

0.25

±250 mV

0.6

0.4

±100 mV

0.7

0.5

±50 mV

0.9

0.8

0 to 10 V

0.5

0.25

0 to 5 V

0.5

0.25

0 to 2 V

0.5

0.25

0 to 1 V

0.5

0.25

0 to 500 mV

0.6

0.4

0 to 200 mV

0.7

0.5

0 to 100 mV

0.9

0.8

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